| 642315 | Aug 13, 2007 | Aug 13, 2007 | Vortt Exploration Company, Inc. | Palo Pinto | H. Green #1 | 2,100 | 36332566 |
| 627755 | Feb 8, 2007 | Feb 8, 2007 | Vortt Exploration Company, Inc. | Duval | Vandervoort, Carl #1A | 3,100 | 13138929 |
| 624731 | Oct 9, 2006 | Oct 9, 2006 | Vortt Exploration Company, Inc. | Duval | Vandervoort, Carl #1 | 3,100 | 13138903 |
| 488984 | Nov 2, 1999 | Nov 2, 1999 | Vortt Exploration Company, Inc. | Archer | Frerich, Eleanor #1 | 4,750 | 00941243 |
| 488984Amendment | Nov 2, 1999 | Nov 2, 1999 | Vortt Exploration Company, Inc. | Archer | Frerich, Eleanor #1 | 4,750 | 00941243 |
| 488984Amendment | Nov 2, 1999 | Nov 2, 1999 | Vortt Exploration Company, Inc. | Archer | Frerich, Eleanor #1 | 4,750 | 00941243 |
| 479904 | Oct 12, 1998 | Oct 12, 1998 | Vortt Exploration Company, Inc. | Palo Pinto | Green, H. #2 | 4,218 | 36332605 |
| 479904Amendment | Oct 12, 1998 | Oct 12, 1998 | Vortt Exploration Company, Inc. | Palo Pinto | Green, H. #2 | 4,230 | 36332605 |
| 465906 | Dec 23, 1997 | Dec 23, 1997 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #17 | 4,700 | 50340854 |
| 457267 | Jan 14, 1997 | Jan 14, 1997 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #16 | 4,700 | 50340805 |
| 454714 | Nov 7, 1996 | Nov 7, 1996 | Vortt Exploration Company, Inc. | Throckmorton | Donnell, Bray #3 | 4,800 | 44735671 |
| 454714Amendment | Nov 7, 1996 | Nov 7, 1996 | Vortt Exploration Company, Inc. | Throckmorton | Donnell, Bray #3 | 4,800 | 44735671 |
| 446415 | May 10, 1996 | May 10, 1996 | Vortt Exploration Company, Inc. | Young | Donnell, J. #5 | 4,900 | 50340741 |
| 444316 | Jan 31, 1996 | Jan 31, 1996 | Vortt Exploration Company, Inc. | Young | Brockman, Dozier #15 | 4,600 | 50340718 |
| 394743 | Dec 12, 1991 | Dec 12, 1991 | Vortt Exploration Company, Inc. | Young | Brockman, Dozier #1 | 4,488 | 50332835 |
| 383721 | Jan 24, 1991 | Jan 24, 1991 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #14 | 800 | 50340291 |
| 372478 | May 3, 1990 | May 3, 1990 | Vortt Exploration Company, Inc. | Throckmorton | Carmack, L. #2 | 4,999 | 44735091 |
| 372478Amendment | May 3, 1990 | May 3, 1990 | Vortt Exploration Company, Inc. | Throckmorton | Carmack, L. #2 | 4,999 | 44735091 |
| 369052 | Jan 26, 1990 | Jan 26, 1990 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #12 | 800 | 50340119 |
| 351754 | Oct 3, 1988 | Oct 3, 1988 | Vortt Exploration Company, Inc. | Young | Singleton, D. #2 | 800 | 50339889 |
| 351753 | Oct 3, 1988 | Oct 3, 1988 | Vortt Exploration Company, Inc. | Young | McReynolds Brothers #2 | 800 | 50339890 |
| 351752 | Oct 3, 1988 | Oct 3, 1988 | Vortt Exploration Company, Inc. | Young | Donnell, J. #4 | 800 | 50339891 |
| 341354 | Jan 14, 1988 | Jan 14, 1988 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #10 | 800 | 50339721 |
| 341353 | Jan 14, 1988 | Jan 14, 1988 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #11 | 800 | 50339720 |
| 341353Amendment | Jan 14, 1988 | Jan 14, 1988 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #11 | 800 | 50339720 |
| 333701 | Aug 7, 1987 | Aug 7, 1987 | Vortt Exploration Company, Inc. | Young | Donnell, J. #2 | 4,600 | 50333567 |
| 329049 | Apr 20, 1987 | Apr 20, 1987 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #2 | 4,525 | 50333016 |
| 326945 | Feb 26, 1987 | Feb 26, 1987 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #1 | 4,488 | 50332835 |
| 325925 | Jan 28, 1987 | Jan 28, 1987 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #8 | 850 | 50339425 |
| 305319 | Aug 18, 1986 | Aug 18, 1986 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #5 | 4,619 | 50336647 |
| 296099 | Jan 24, 1986 | Jan 24, 1986 | Vortt Exploration Company, Inc. | Young | Donnell, J. #3 | 1,200 | 50339151 |
| 296026 | Jan 23, 1986 | Jan 23, 1986 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #9 | 800 | 50339149 |
| 296025 | Jan 23, 1986 | Jan 23, 1986 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #8 | 800 | 50339148 |
| 263460 | Jan 9, 1985 | Jan 9, 1985 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #7 | 800 | 50338574 |
| 247143 | Aug 2, 1984 | Aug 2, 1984 | Vortt Exploration Company, Inc. | Throckmorton | Brockman, J. #1 | 4,654 | 44732028 |
| 234113 | Apr 2, 1984 | Apr 2, 1984 | Vortt Exploration Company, Inc. | Throckmorton | Brockman, J. #5 | 3,200 | 44734018 |
| 233610 | Mar 27, 1984 | Mar 27, 1984 | Vortt Exploration Company, Inc. | Throckmorton | Brockman, J. #4 | 3,200 | 44734012 |
| 226881 | Jan 16, 1984 | Jan 16, 1984 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #6 | 606 | 50337899 |
| 192648 | Apr 15, 1983 | Apr 15, 1983 | Vortt Exploration Company, Inc. | Young | Graham, M.K. "E" #3 | 650 | 50336862 |
| 190426 | Apr 4, 1983 | Apr 4, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | Benie H. Peak Unit I #1 | 4,700 | 36332353 |
| 190609 | Mar 21, 1983 | Mar 21, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | Varnell-Seay Unit #1 | 2,950 | 36332237 |
| 188935 | Mar 18, 1983 | Mar 18, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | W. Hess Unit II #1 | 4,600 | 36332460 |
| 188934 | Mar 18, 1983 | Mar 18, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | Woolridge, L. A. #1 | 4,650 | 36332341 |
| 188933 | Mar 18, 1983 | Mar 18, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | Leon Jenkins Unit I #1 | 4,700 | 36332426 |
| 188932 | Mar 18, 1983 | Mar 18, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | Rhodes-Green #1 | 4,500 | 36332129 |
| 189815 | Mar 3, 1983 | Mar 3, 1983 | Vortt Exploration Company, Inc. | Palo Pinto | Lawson-Stasio Unit #1 | 3,000 | 36332202 |
| 184754 | Jan 17, 1983 | Jan 17, 1983 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #5 | 4,600 | 50336647 |
| 179641 | Dec 6, 1982 | Dec 6, 1982 | Vortt Exploration Company, Inc. | Palo Pinto | Baum Unit IV #1 | 1,600 | 36333038 |
| 170851 | Sep 2, 1982 | Sep 2, 1982 | Vortt Exploration Company, Inc. | Palo Pinto | Kate #1 | 1,400 | 36332979 |
| 170467 | Aug 31, 1982 | Aug 31, 1982 | Vortt Exploration Company, Inc. | Palo Pinto | Withers, Jordan B. #1S | 1,400 | 36332965 |
| 163464 | Jun 14, 1982 | Jun 14, 1982 | Vortt Exploration Company, Inc. | Palo Pinto | Withers Unit 1 #1 | 4,500 | 36332295 |
| 151233 | Feb 19, 1982 | Feb 19, 1982 | Vortt Exploration Company, Inc. | Palo Pinto | Tuggle #1 | 4,700 | 36332858 |
| 147454 | Dec 31, 1981 | Dec 31, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Rhodes-Green Unit II #1 | 4,700 | 36332344 |
| 140248 | Nov 10, 1981 | Nov 10, 1981 | Vortt Exploration Company, Inc. | Haskell | Houston, M. #1 | 4,950 | 20731175 |
| 139568 | Nov 4, 1981 | Nov 4, 1981 | Vortt Exploration Company, Inc. | Eastland | Wright-Roper #1 | 4,300 | 13332413 |
| 139409 | Nov 3, 1981 | Nov 3, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Wooldridge, L. A. #1 | 4,650 | 36332341 |
| 139242 | Nov 2, 1981 | Nov 2, 1981 | Vortt Exploration Company, Inc. | Throckmorton | Young Ranch South #1 | 4,750 | 44732952 |
| 139241 | Nov 2, 1981 | Nov 2, 1981 | Vortt Exploration Company, Inc. | Throckmorton | Young Ranch North #1 | 4,800 | 44732951 |
| 136366 | Oct 14, 1981 | Oct 14, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Glidewell, M. Unit #1 | 4,600 | 36332383 |
| 129033 | Aug 7, 1981 | Aug 7, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Whitis #2 | 1,750 | 36332717 |
| 127392 | Jul 28, 1981 | Jul 28, 1981 | Vortt Exploration Company, Inc. | Haskell | Bounds, D. #1 | 3,600 | 20731117 |
| 126731 | Jul 24, 1981 | Jul 24, 1981 | Vortt Exploration Company, Inc. | Throckmorton | Richards Ranch #2 | 1,500 | 44731822 |
| 127391 | Jul 10, 1981 | Jul 10, 1981 | Vortt Exploration Company, Inc. | Haskell | N. Shelton #1 | 3,550 | 20731108 |
| 123838 | Jun 23, 1981 | Jun 23, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Damm #1 | 4,500 | 36332656 |
| 120154 | Jun 5, 1981 | Jun 5, 1981 | Vortt Exploration Company, Inc. | Eastland | Brown, Fred #4 | 4,100 | 13333063 |
| 120053 | Jun 1, 1981 | Jun 1, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Bankhead-Damm Unit I #1 | 4,214 | 36332644 |
| 130926 | Apr 22, 1981 | Apr 22, 1981 | Vortt Exploration Company, Inc. | Eastland | Brown, Fred 16287 #2 | 4,100 | 13332381 |
| 124345 | Apr 22, 1981 | Apr 22, 1981 | Vortt Exploration Company, Inc. | Eastland | Brown, Fred #2 | 4,100 | 13332381 |
| 114987 | Mar 30, 1981 | Mar 30, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Green, H. #2 | 4,230 | 36332605 |
| 113315 | Mar 26, 1981 | Mar 26, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Beardsley Heirs #1 | 3,110 | 36332614 |
| 113313 | Mar 26, 1981 | Mar 26, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Baum, D. Unit III #1 | 3,100 | 36332613 |
| 113312 | Mar 26, 1981 | Mar 26, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Stone, C. #2 | 3,128 | 36332612 |
| 113311 | Mar 26, 1981 | Mar 26, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Stone, C. #1 | 4,600 | 36332611 |
| 111950 | Mar 12, 1981 | Mar 12, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Dunaway, W. T. Unit III #1 | 3,150 | 36332592 |
| 114989 | Mar 2, 1981 | Mar 2, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Branson, M.H. Unit I #1 | 4,250 | 36332604 |
| 108616 | Feb 17, 1981 | Feb 17, 1981 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #3 | 4,605 | 50334638 |
| 108332 | Feb 12, 1981 | Feb 12, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Green, H. #1 | 4,500 | 36332566 |
| 107673 | Feb 5, 1981 | Feb 5, 1981 | Vortt Exploration Company, Inc. | Young | Lowrance, M. P. #1 | 4,700 | 50334603 |
| 108649 | Jan 30, 1981 | Jan 30, 1981 | Vortt Exploration Company, Inc. | Young | Dozier-Brockman #4 | 660 | 50334639 |
| 106852 | Jan 29, 1981 | Jan 29, 1981 | Vortt Exploration Company, Inc. | Palo Pinto | Scoggins et al Unit I #1 | 4,700 | 36332560 |
| 101840 | Dec 11, 1980 | Dec 11, 1980 | Vortt Exploration Company, Inc. | Eastland | Wright-Pope #1 | 3,810 | 13332687 |
| 101037 | Dec 5, 1980 | Dec 5, 1980 | Vortt Exploration Company, Inc. | Young | Singleton, D. #1A | 4,565 | 50334436 |
| 96518 | Oct 22, 1980 | Oct 22, 1980 | Vortt Exploration Company, Inc. | Runnels | Smallwood #1 | 4,300 | 39931769 |
| 95286 | Oct 9, 1980 | Oct 9, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Eaton, D.E. Unit I #1 | 4,350 | 36332482 |
| 95284 | Oct 9, 1980 | Oct 9, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Dunaway, W.T. Unit II #1 | 4,600 | 36332481 |
| 94467 | Oct 2, 1980 | Oct 2, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Peak, Benie H. Unit II #1 | 4,600 | 36332476 |
| 94163 | Sep 30, 1980 | Sep 30, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | D. Baum Unit II #1 | 4,700 | 36332346 |
| 91204 | Sep 2, 1980 | Sep 2, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Hargett Unit #1 | 4,600 | 36332461 |
| 91471 | Aug 22, 1980 | Aug 22, 1980 | Vortt Exploration Company, Inc. | Throckmorton | Brockman, J. #3 | 3,152 | 44732347 |
| 90755 | Aug 22, 1980 | Aug 22, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Hess, W. Unit II #1 | 4,600 | 36332460 |
| 90491 | Aug 21, 1980 | Aug 21, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Glidewell, B. #1 | 4,600 | 36332457 |
| 90490 | Aug 21, 1980 | Aug 21, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Fitzgerald et Al #1 | 5,000 | 36332456 |
| 90489 | Aug 21, 1980 | Aug 21, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Dunaway, W. T. Unit 1 #1 | 3,465 | 36332455 |
| 90318 | Aug 20, 1980 | Aug 20, 1980 | Vortt Exploration Company, Inc. | Throckmorton | Bray-Donnell #2D | 1,210 | 44781896 |
| 88395 | Jul 31, 1980 | Jul 31, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Welch Estate #1 | 4,700 | 36332430 |
| 88393 | Jul 31, 1980 | Jul 31, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Glover, H. #1 | 4,650 | 36332429 |
| 88391 | Jul 31, 1980 | Jul 31, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Squires Heirs Unit #1 | 4,650 | 36332428 |
| 88366 | Jul 31, 1980 | Jul 31, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Melton-Terry Unit #1 | 4,650 | 36332427 |
| 88243 | Jul 30, 1980 | Jul 30, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Leon Jenkins Unit I #1 | 4,500 | 36332426 |
| 86639 | Jul 15, 1980 | Jul 15, 1980 | Vortt Exploration Company, Inc. | Palo Pinto | Kelly, Velma #1 | 4,600 | 36332412 |